Question

which statement about the cell membrane is true? it contains cellulose and sugars that are involved in communication. it is present in animal cells only. it is rigid and elastic for supporting the cells shape. it prevents harmful substances from entering a cell.

Explanation:

The cell - membrane is semi - permeable and prevents harmful substances from entering the cell. Cellulose is in the cell wall (not cell membrane), and the cell membrane is flexible, not rigid. Also, it is present in both animal and plant cells.

Answer:

It prevents harmful substances from entering a cell.